<?php
/** @package    verysimple::HTTP */

/**
 * BrowserDevice represents a device used when browsing (or executing)
 * the current code.
 * This is a Singleton pattern, cannot be
 * instantiated directly.
 *
 * TODO: this only has minimal support and basically only supplies
 * information about whether the device is mobile or not, and if so
 * it supplies the major vendor name.
 *
 * Usage:
 * $browser = BrowserDevice::GetInstance();
 * if ($device->IsMobile()) dosomething();
 *
 * @package verysimple::HTTP
 * @author VerySimple Inc.
 * @copyright 1997-2007 VerySimple, Inc. http://www.verysimple.com
 * @license http://www.gnu.org/licenses/lgpl.html LGPL
 * @version 1.0
 */
class BrowserDevice
{
    
    /**
     * patters to search for devices
     *
     * @var Array
     */
    static $DESKTOP_DEVICE_PATTERNS = array (
            'AdobeAIR' => 'AdobeAIR',
            'chrome' => 'google',
            'firefox' => 'mozilla',
            'MSIE' => 'microsoft',
            'safari' => 'apple'
    );
    
    /**
     * patters to search for devices
     *
     * @var Array
     */
    static $MOBILE_DEVICE_PATTERNS = array (
            '(ipad|ipod|iphone)' => 'apple',
            'android' => 'android',
            'opera mini' => 'opera',
            'blackberry' => 'blackberry',
            '(pre\/|palm os|palm|hiptop|avantgo|plucker|xiino|blazer|elaine)' => 'palm',
            '(iris|3g_t|windows ce|opera mobi|windows ce; smartphone;|windows ce; iemobile)' => 'windows',
            '(mini 9.5|vx1000|lge |m800|e860|u940|ux840|compal|wireless| mobi|ahong|lg380|lgku|lgu900|lg210|lg47|lg920|lg840|lg370|sam-r|mg50|s55|g83|t66|vx400|mk99|d615|d763|el370|sl900|mp500|samu3|samu4|vx10|xda_|samu5|samu6|samu7|samu9|a615|b832|m881|s920|n210|s700|c-810|_h797|mob-x|sk16d|848b|mowser|s580|r800|471x|v120|rim8|c500foma:|160x|x160|480x|x640|t503|w839|i250|sprint|w398samr810|m5252|c7100|mt126|x225|s5330|s820|htil-g1|fly v71|s302|-x113|novarra|k610i|-three|8325rc|8352rc|sanyo|vx54|c888|nx250|n120|mtk |c5588|s710|t880|c5005|i;458x|p404i|s210|c5100|teleca|s940|c500|s590|foma|samsu|vx8|vx9|a1000|_mms|myx|a700|gu1100|bc831|e300|ems100|me701|me702m-three|sd588|s800|8325rc|ac831|mw200|brew |d88|htc\/|htc_touch|355x|m50|km100|d736|p-9521|telco|sl74|ktouch|m4u\/|me702|8325rc|kddi|phone|lg |sonyericsson|samsung|240x|x320|vx10|nokia|sony cmd|motorola|up.browser|up.link|mmp|symbian|smartphone|midp|wap|vodafone|o2|pocket|kindle|mobile|psp|treo)' => 'unknown'
    );
    private static $instance;
    public $UserAgent;
    public $IsWAP;
    public $IsMobile;
    public $IsTablet;
    public $IsConsole;
    public $Vendor;
    public $SupportsJS;
    public $SupportsCSS;
    public $IsNativeDevice;
    public $NativeClientVersion;
    
    /**
     * Private constructor enforces the Singleton pattern
     */
    private function __construct()
    {
        // do nothing
    }
    
    /**
     * Parse the user agent and detect the browser, populating
     * all internal properties accordingly
     */
    public function Detect()
    {
        // RESET DEFAULT VALUES
        $this->IsWAP = false;
        $this->IsMobile = false;
        $this->IsTablet = false;
        $this->IsConsole = false;
        $this->Vendor = 'unknown';
        $this->SupportsJS = true;
        $this->SupportsCSS = true;
        
        $this->UserAgent = isset($_SERVER ['HTTP_USER_AGENT']) ? $_SERVER ['HTTP_USER_AGENT'] : "";
        $wap = isset($_SERVER ['HTTP_X_WAP_PROFILE']) ? $_SERVER ['HTTP_X_WAP_PROFILE'] : "";
        
        if (! $this->UserAgent) {
            $this->IsConsole = true;
        } else {
            foreach (BrowserDevice::$MOBILE_DEVICE_PATTERNS as $key => $val) {
                if (preg_match('/' . $key . '/i', $this->UserAgent)) {
                    $this->IsMobile = true;
                    $this->Vendor = $val;
                    break;
                }
            }
            
            if ($this->IsMobile == false) {
                foreach (BrowserDevice::$DESKTOP_DEVICE_PATTERNS as $key => $val) {
                    if (preg_match('/' . $key . '/i', $this->UserAgent)) {
                        $this->Vendor = $val;
                        break;
                    }
                }
            }
        }
    }
    
    /**
     * Returns an instance of a BrowserDevice populated based on the
     * server variables provided
     *
     * @return BrowserDevice
     */
    public static function GetInstance()
    {
        if (! isset(self::$instance)) {
            $c = __CLASS__;
            self::$instance = new $c ();
            self::$instance->Detect();
        }
        
        return self::$instance;
    }
}
